Keyless Bushing Flange Type Flanged For Bore Diameter 1 3/4 in Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 2 5/8 in Overall Width 2.157 in System of Measurement Inch Finish Zinc Plated Hub Contact Pressure 5 249 psi Maximum Transmitted Torque 9 577 ft-lb Outside Diameter Tolerance +/-0.003